I just bought a used JB 135i last week and did a wash today after the rain. I couldn't believe that when I used my fingers to rub across the paint, it would create tiny swirls. I tested it a couple of times just to make sure I wasn't seeing things. My fingers look ok and smooth to me, LOL.
I then took the plush microfiber towel that I used to dry the car with and rubbed it across the paint. No swirl marks.
Wow....from a finger.
In the Spring, when I strip and do a full detail, I'm curious to see what the real condition of the paint is. I wonder if my fingers were rubbing off the fillers. If so, I better prepare myself for a few days of work